Punch.



G. E. LEITH. 'PUNOH. APPLICATION FILED AUG. 20, 1909.

1,016,752. Patented Feb. 6, 1912.

GEORGE E. LEITH, OF SAN DIEGO, CALIFORNIA.

PUNCH.

Specification of Letters Patent.

Patented Feb. 6, 1912.

Application filed August 20, 1909. Serial No. 513,806.

To all whom it may concern Be it known that I, GEORGE E. LEITH, citizen of the United States, residing at San Diego, in the county of San Diego and State of California, have invented certain new and useful Improvements in Punches, of which the following is a specification.

This invention relates to cutting implements and refers particularly to a punch adapted for perforating straps for the reception of buckle tongues.

An object of this invention is to so con struct a punch that the cutter thereof will perforate the strap diagonally in order to form an aperture which extends in the direction of the tongue of the buckle so that the strain upon the strap will be equally disposed upon the several layers of the same, so that the strap will be protected from raveling or tearing at the point of contact with the buckle tongue.

Another object of this invention is to form a punch or cutter of this character which is of simple formation and which may be actuated by hand in order to adapt the same to general usage and for perforating the strap as above set forth without any unnecessary formation for attachment to the implement.

For a full understanding of the invention and the merits thereof, and also to acquire a knowledge of the details of construction and the means for effecting the result, reference is to be had to the following description and accompanying drawings, in which;

Figure 1 is a side elevation of the complete implement; Fig. 2 is a section taken on the line 2-2 of Fig. 1 and disclosing in dotted lines a section of a strap engaged over the anvil of a punch; Fig. 3 is a detail perspective view of the cutter carried by the punch; Fig. 4 is a fragmentary perspective view of the strap after being perforated with the improved implement; Fig. 5 is a longitudinal sectional view through a buckle having a strap applied to the same, and disclosing the position which the tongue assumes through'the aperture formed in the strap by the improved implement.

Corresponding and like parts are referred to in the following description and indicated in all the views of the accompanying drawings by the same reference characters.

Referring to the drawings, the improved implement includes a pair of handles 10 and 11 which are intermediately crossed and recessed as at 12 at their intersecting portions in order to permit of the interlocking engagement of the handles 10 and 11 and in order to form shoulders 13 for the limitation of the movement of the handles.

A pivot pin let is employed for securing the handles 10 and 11 together and is inserted through the central portions of the intersecting parts of the handles in order to form a free axis about which the handle rotates.

The outer ends of the handles 10 and 11 are formed into jaws 15 and 16, the latter being curved slightly inwardly in order to dispose the same in parallel upon the contracting of the handles 10 and 11 to seat the cutter 17 upon the anvil 18. The cutter 17 comprises a tubular member which is inserted at its upper end through the jaw 15 and rigidly engaged therein, the same being prevented from sliding movement therethrough by the provision of a collar 19 which is angularly formed about the cutter 17 intermediately thereof, the collar 19 being engaged against the inner face of the jaw 15. The lower end of the cutter 17 is terminated in a beveled edge 20 which is formed diagonally'to the axis of the cutter 17 and is adapted for engagement upon the diagonally positioned anvil 18.

The means disclosed in the drawings for supporting the anvil 18 in diago-nal'position comprises the twisting or bending of the lower jaw 16, from the plane of the handle 10 and in a parallel plane with the cutting edge 20 thereby disposing the anvil 18 in such plane and causing the seating of the edge 20 upon the anvil about the same. The anvil 20 comprises a metallic stud, the shank of which is embedded in the inner face of the jaw 16 in order to prevent the lateral movement of the stud and to rigidly support the anvil 18 thereabout. Normally the handles 10 and 11 are held in a separated position through the medium of the leaf spring 21 which is carried against the inner face of the handle 10 by means of the set screw 22 while the opposite end of the leaf spring 21 engages slidably against the inner face of the handle 11 and is provided with a loop 23 for guiding the same thereover during the contraction of the handles.

In Fig. 2 of the drawings the improved punch is disclosed in section as being in position after cutting the section of strap 24 which is disposed over the anvil 20. It will be noted in this figure that the aperture, designated as 25, formed in the strap 24 is in vertical alinement with the plane of the implement and disposed at right angles to the axis of the cutter 20, the aperture 25 being diagonally formed with respect to the opposite faces of the strap 24, owing to the position of the strap upon the obliquely or diagonally turned a'nvil 20.

In Fig. 4 it will be noted that the perforation or aperture formed through the strap 24is slanted inwardly from the end of the strap whereby the insertion of the tongue 26 of the buckle 27 is permitted to engage through the strap without causing any undue pressure against the lower edgeof the strap at the lower face thereof, as seen in Fig. 5, but is engaged with equal friction through the aperture 25 against the entire inner edge of the strap 24. This implement is therefore believed to be a decided advantage since it forms a diagonal perforation through the strap when the implement is applied in the usual manner and it is not dependent upon the holding of the implement in any adjusted position in order to form the aperture at such an angle. From the curving or bending of the jaw 16 it will be noted that the strap 24 will be forced downwardly upon the anvil 18 in the desired angle relative to the axis of the cutter 20. In punching the strap 24 the same is engaged over the anvil 18 at the desired point for the perforation when the handles 10 and 11 are contracted and thereby causethe closing of the jaws 15 and 16 upon the strap in order to force the cutting edge 20 through the strap 24 and against the anvil 18. It will be noted from this construction that the anvil 18 is arranged to present its face in a plane corresponding to the plane of the cutting edge 20 of the tubular member 17 and that as the lower jaw'carries the anvil 18 the same must be twisted into the same plane.

Having thus described the invention, what is claimed as new is 1. A punching tool including pivotally united handles terminating in longitudinally disposed jaws, one of said jaws being twisted to present an inner face disposed at an oblique angle to the adjacent face of the mating jaw, a correspondingly inclined anvil seated in the inner face of the twisted jaw, and a tubular cutter secured to and depending from the inner face of the mating jaw and having its free end provided with a cutting edge inclined to conform to and adapted to bear against the upper surface of the anvil.

2. A punching tool including pivotally united handles terminating in longitudinally disposed jaws, the free ends of which are bent inwardly at an angle to the longitudinal plane of the handles, the bent portion of one of the jaws being twisted to present an inner face disposed at an oblique angle to the inner face of the mating jaw, a correspondingly inclined anvil seated in the inner face of the twisted jaw, and a tubular cutter secured to and depending from the inner face of the mating jaw and having its free end provided with a cutting edge inclined to conform to and adapted to bear against the upper surface of the anvil.

3. A punching tool including pivotally united handles terminating in longitudinally disposed jaws, one of said jaws being twisted to present an inner face disposed at an oblique angle tothe adjacent face of the mating aw, and a tubular cutter secured to and depending from the inner face of said mating jaw and having its free end provided with a cutting edge inclined to conform to the inner face of the twisted aw.

In testimony whereof I afiix my signature in presence of two witnesses.

GEORGE E. LEITH. [L. s.]

Witnesses:

ARTHUR GRANDJEUR, SYLvEsTER ARTLEY.

(iopies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents,

Washington, D. G. 

